Sewers

how much drop per 50' run for main sewer line to septic tank?

& how much drain field size for 1000 gal tank. Which league do you play for? We did a perk test on the one that we installed next door 6 yrs ago, however the septic tank that we installed there had to be 2500 gallons for the school & we extended the drain fields at the time. My main question is how much drop per 50' for the 4" line. I forgot.

Public Comments

1. this is way outta my league, sadly...
2. You will need to have a perk test run on your soil first to determine the absortion rate. From this test --- you can then figure out how many lateral lines to install , and area. This is rather important to do ---- first , and it will cost for a guy to come out to test it. Do some more research on the net about this perk testing -- to become more familar with setting up a septic tank system. Spock
3. 12.5 Feet, at 1/4" per foot.
4. Normal slope is 1 % , or 1/8" per foot drop = 1/8 x 50 = 6.25 inches
5. The code here in The Florida Panahndle is a 5% slope on the drop...
6. The answer to your main question will be determined by local code. Standard is 1/4 inch drop per foot of run for a septic tank. A fifty foot run would require 12.5 inches of drop. Local code will also dictate how much drain field you need.
7. 4" line would require 1/8"/ft drop, so over 50' that would be 6.25". the sizing of the drainage field is dependant on the soil conditions, perculation rate, etc.